For 1976 & later Mercury/Mariner 2-cyl, 35 Hp | 3-cyl, 50-90 Hp | 4-cyl, 45-75 Hp | 6-cyl, 90-115 Hp | V6, 135-225 Hp outboard engines. Replaces OE “square style” Eaton. Works on all Design I OE hydraulic pump assemblies.

also crosses with:
Sierra: 18-6273-1
API Marine: PT470N
ARCO: 6278
Mallory: 9-18213, 9-18205
MES: T1073M